Download booster for ADSL transmission

Abstract

Systems and methods are described for a download booster for ADSL transmission. A method includes extending a digital subscriber loop including: coupling a telephone company central office to a customer premises via the digital subscriber loop; filtering a downstream digital subscriber loop signal at the customer premises; and amplifying the downstream digital subscriber loop signal at the customer premises. A method, includes: providing a digital subscriber loop service to a customer premises that is coupled to a telephone central office via a digital subscriber loop line; filtering a downstream digital subscriber loop signal at the customer premises; and amplifying the downstream digital subscriber loop signal at the customer premises. A method, includes extending a digital subscriber loop including: coupling a telephone company central office to a customer premises via the digital subscriber loop; filtering an upstream digital subscriber loop signal at the customer premises; and isolating the upstream digital subscriber loop signal at the customer premises. A method, comprises: providing a digital subscriber loop service to a customer premises that is coupled to a telephone central office via a digital subscriber loop line; filtering an upstream digital subscriber loop signal at the customer premises; and isolating the upstream digital subscriber loop signal at the customer premises. An apparatus includes a download booster coupled to a digital subscriber loop line and a customer premises modem.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS[0001]This application is related to, and claims a benefit of priority under 35 U.S.C. 119(e) and / or 35 U.S.C. 120 from, copending U.S. Ser. No. 60 / 301,584, filed Jun. 27, 2001, now pending, the entire contents of which are hereby expressly incorporated by reference for all purposes.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates generally to the field of digital subscriber lines. More particularly, the invention relates to asymmetric digital subscriber lines. Specifically, a preferred implementation of the invention relates to asymmetric digital subscriber lines over long loops.[0004]2. Discussion of the Related Art[0005]Asymmetric Digital Subscriber Line (ADSL) technology provides one of the most efficient and popular methods used for providing connectivity between a subscriber's premises and the Central Office of the serving telephone company. The primary use of ADSL today is for providing subscribers w...

AI Technical Summary

Problems solved by technology

A problem with this technology has been the decreasing bit-rate capacity of ADSL with increasing loop length.

However, there are regulatory constraints that prevent this arbitrary power spectral shaping.

Additionally, the longer the loop, the greater the possibility of having induced interfering signals from such diverse sources as AM radio broadcasts and from signals present in other loops that share the same binder group (subscriber cable is constructed with several loops, typically 25 pairs, contained in a common sheath or “binder group”).

Thus, inherently, there is an analog-to-digital conversion process and the added quantization noise further, negatively, impacts the supportable bit-rate.

However, a disadvantage of this approach is the need for additional Central Office equipment.

Another disadvantage of this approach has been relatively high cost.

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